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Développement d'un indicateur d'exposition des eaux de surface aux pertes de pesticides à l'échelle du bassin versant

Abstract : Surface water pollution by pesticides is a great environmental concern. In order to limit pesticides transfers from agricultural field to surface water, mitigation strategies are implemented. Their effectiveness has then to be assessed by specific tools. Most of pesticide runoff risk assessment tools are simple indicators or simulation models. Both can be performing for field application but most of the available methods are not yet adapted to help catchment managers in their decision process. Simple indicators lack taking into account inherent variability of watersheds structures and mechanistic models demands too many data to be used as routine tools. The aim of this study is then to develop a catchment scale pesticide runoff risk assessment tool to help catchment managers to identify risky situations. We developed two indicators: one to assess agricultural impact on pesticide runoff risk at a field scale and the other field spatial position impact on runoff route from the field to the hydrological network. Aggregating those two indicators lead us to assess catchment fields pesticide runoff risk and allows comparing agronomical or climatic scenarios. We based both indicators on modelling assuming that processes described by model make possible to explore wide factors variation ranges and to build databases on which indicators are developed
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  • HAL Id : tel-01753055, version 1
  • PRODINRA : 29706

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Julie Wohlfahrt. Développement d'un indicateur d'exposition des eaux de surface aux pertes de pesticides à l'échelle du bassin versant. Sciences agricoles. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL101N⟩. ⟨tel-01753055⟩

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